Patents Assigned to Introtek International, Inc.
  • Contact type liquid level sensing system
    Patent number: 5155472
    Abstract: A liquid level sensing device having a transducer in which successive bursts of pulses of ultrasonic energy are transmitted across a gap. When liquid is present in the gap the bursts of pulses are received and signal processed to indicate the presence of liquid in the gap.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: October 13, 1992
    Assignee: Introtek International, Inc.
    Inventor: Naim Dam
  • Liquid sensing system
    Patent number: 4733560
    Abstract: A liquid level sensing system having a sensing head with a pair of mutually insulated metal electrodes, one of the electrodes connected to the output of an amplifier and the other to the input. The gain of the amplifier is sufficienty high such that it will oscillate when the electrodes are immersed in a liquid and will be non-oscillatory when the electrodes are in air. The oscillation of the amplifier is detected to produce a signal corresponding to the presence of a liquid and also its characteristic.
    Type: Grant
    Filed: August 13, 1986
    Date of Patent: March 29, 1988
    Assignee: Introtek International, Inc.
    Inventor: Naim Dam